mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-12-26 13:41:07 +00:00
3bcfc5539c
I hate everything about this. Is is xy or yx now? Do I need to combine(a, b) or combine(b, a)?
118 lines
5.1 KiB
C
118 lines
5.1 KiB
C
/*
|
|
* Copyright © 2019 Benjamin Otte
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
* Authors: Benjamin Otte <otte@gnome.org>
|
|
*/
|
|
|
|
|
|
#pragma once
|
|
|
|
#include "gsktransform.h"
|
|
|
|
#include <gtk/css/gtkcss.h>
|
|
#include "gtk/css/gtkcssparserprivate.h"
|
|
|
|
/* declares GdkDihedralTransform */
|
|
#include "gdk/gdksubsurfaceprivate.h"
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
typedef struct _GskTransformClass GskTransformClass;
|
|
|
|
/**
|
|
* GskFineTransformCategory:
|
|
* @GSK_FINE_TRANSFORM_CATEGORY_UNKNOWN: The category of the matrix has not been
|
|
* determined.
|
|
* @GSK_FINE_TRANSFORM_CATEGORY_ANY: Analyzing the matrix concluded that it does
|
|
* not fit in any other category.
|
|
* @GSK_FINE_TRANSFORM_CATEGORY_3D: The matrix is a 3D matrix. This means that
|
|
* the w column (the last column) has the values (0, 0, 0, 1).
|
|
* @GSK_FINE_TRANSFORM_CATEGORY_2D: The matrix is a 2D matrix. This is equivalent
|
|
* to graphene_matrix_is_2d() returning %TRUE. In particular, this
|
|
* means that Cairo can deal with the matrix.
|
|
* @GSK_FINE_TRANSFORM_CATEGORY_2D_DIHEDRAL: The matrix is a combination of 2D scale,
|
|
* 2D translation, and 90 degree rotation operations. In particular, this means
|
|
* that any rectangle can be transformed exactly using this matrix.
|
|
* @GSK_FINE_TRANSFORM_CATEGORY_2D_NEGATIVE_AFFINE: The matrix is a combination of
|
|
* (positive or negative) 2D scale and 2D translation operations. This category
|
|
* only exists to ease mapping to GskTransform.
|
|
* @GSK_FINE_TRANSFORM_CATEGORY_2D_AFFINE: The matrix is a combination of positive
|
|
* 2D scale and 2D translation operations. In particular, this means that any
|
|
* rectangle can be transformed exactly using this matrix without flipping.
|
|
* @GSK_FINE_TRANSFORM_CATEGORY_2D_TRANSLATE: The matrix is a 2D translation.
|
|
* @GSK_FINE_TRANSFORM_CATEGORY_IDENTITY: The matrix is the identity matrix.
|
|
*
|
|
* The categories of matrices relevant for GSK and GTK.
|
|
*
|
|
* Note that any category includes matrices of all later categories.
|
|
* So if you want to for example check if a matrix is a 2D matrix,
|
|
* `category >= GSK_TRANSFORM_CATEGORY_2D` is the way to do this.
|
|
*
|
|
* Also keep in mind that rounding errors may cause matrices to not
|
|
* conform to their categories. Otherwise, matrix operations done via
|
|
* multiplication will not worsen categories. So for the matrix
|
|
* multiplication `C = A * B`, `category(C) = MIN (category(A), category(B))`.
|
|
*/
|
|
typedef enum
|
|
{
|
|
GSK_FINE_TRANSFORM_CATEGORY_UNKNOWN,
|
|
GSK_FINE_TRANSFORM_CATEGORY_ANY,
|
|
GSK_FINE_TRANSFORM_CATEGORY_3D,
|
|
GSK_FINE_TRANSFORM_CATEGORY_2D,
|
|
GSK_FINE_TRANSFORM_CATEGORY_2D_DIHEDRAL,
|
|
GSK_FINE_TRANSFORM_CATEGORY_2D_NEGATIVE_AFFINE,
|
|
GSK_FINE_TRANSFORM_CATEGORY_2D_AFFINE,
|
|
GSK_FINE_TRANSFORM_CATEGORY_2D_TRANSLATE,
|
|
GSK_FINE_TRANSFORM_CATEGORY_IDENTITY
|
|
} GskFineTransformCategory;
|
|
|
|
struct _GskTransform
|
|
{
|
|
const GskTransformClass *transform_class;
|
|
|
|
GskFineTransformCategory category;
|
|
GskTransform *next;
|
|
};
|
|
|
|
gboolean gsk_transform_parser_parse (GtkCssParser *parser,
|
|
GskTransform **out_transform);
|
|
|
|
void gsk_transform_to_dihedral (GskTransform *self,
|
|
GdkDihedral *out_dihedral,
|
|
float *out_scale_x,
|
|
float *out_scale_y,
|
|
float *out_dx,
|
|
float *out_dy);
|
|
|
|
void gsk_matrix_transform_point (const graphene_matrix_t *m,
|
|
const graphene_point_t *p,
|
|
graphene_point_t *res);
|
|
void gsk_matrix_transform_point3d (const graphene_matrix_t *m,
|
|
const graphene_point3d_t *p,
|
|
graphene_point3d_t *res);
|
|
void gsk_matrix_transform_bounds (const graphene_matrix_t *m,
|
|
const graphene_rect_t *r,
|
|
graphene_rect_t *res);
|
|
void gsk_matrix_transform_rect (const graphene_matrix_t *m,
|
|
const graphene_rect_t *r,
|
|
graphene_quad_t *res);
|
|
|
|
#define gsk_transform_get_fine_category(t) ((t) ? (t)->category : GSK_FINE_TRANSFORM_CATEGORY_IDENTITY)
|
|
|
|
G_END_DECLS
|
|
|
|
|